--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2010, VMware, inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+
+static boolean TAG(do_cliptest)( struct pt_post_vs *pvs,
+ struct draw_vertex_info *info )
+{
+ struct vertex_header *out = info->verts;
+ const float *scale = pvs->draw->viewport.scale;
+ const float *trans = pvs->draw->viewport.translate;
+ /* const */ float (*plane)[4] = pvs->draw->plane;
+ const unsigned pos = draw_current_shader_position_output(pvs->draw);
+ const unsigned ef = pvs->draw->vs.edgeflag_output;
+ const unsigned nr = pvs->draw->nr_planes;
+ const unsigned flags = (FLAGS);
+ unsigned need_pipeline = 0;
+ unsigned j;
+
+ for (j = 0; j < info->count; j++) {
+ float *position = out->data[pos];
+ unsigned mask = 0x0;
+
+ initialize_vertex_header(out);
+
+ if (flags & (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_HALF_Z | DO_CLIP_USER)) {
+ out->clip[0] = position[0];
+ out->clip[1] = position[1];
+ out->clip[2] = position[2];
+ out->clip[3] = position[3];
+
+ /* Do the hardwired planes first:
+ */
+ if (flags & DO_CLIP_XY) {
+ if (-position[0] + position[3] < 0) mask |= (1<<0);
+ if ( position[0] + position[3] < 0) mask |= (1<<1);
+ if (-position[1] + position[3] < 0) mask |= (1<<2);
+ if ( position[1] + position[3] < 0) mask |= (1<<3);
+ }
+
+ /* Clip Z planes according to full cube, half cube or none.
+ */
+ if (flags & DO_CLIP_FULL_Z) {
+ if ( position[2] + position[3] < 0) mask |= (1<<4);
+ if (-position[2] + position[3] < 0) mask |= (1<<5);
+ }
+ else if (flags & DO_CLIP_HALF_Z) {
+ if ( position[2] < 0) mask |= (1<<4);
+ if (-position[2] + position[3] < 0) mask |= (1<<5);
+ }
+
+ if (flags & DO_CLIP_USER) {
+ unsigned i;
+ for (i = 6; i < nr; i++) {
+ if (dot4(position, plane[i]) < 0)
+ mask |= (1<<i);
+ }
+ }
+
+ out->clipmask = mask;
+ need_pipeline |= out->clipmask;
+ }
+
+ if ((flags & DO_VIEWPORT) && mask == 0)
+ {
+ /* divide by w */
+ float w = 1.0f / position[3];
+
+ /* Viewport mapping */
+ position[0] = position[0] * w * scale[0] + trans[0];
+ position[1] = position[1] * w * scale[1] + trans[1];
+ position[2] = position[2] * w * scale[2] + trans[2];
+ position[3] = w;
+ }
+
+ if ((flags & DO_EDGEFLAG) && ef) {
+ const float *edgeflag = out->data[ef];
+ out->edgeflag = !(edgeflag[0] != 1.0f);
+ need_pipeline |= !out->edgeflag;
+ }
+
+ out = (struct vertex_header *)( (char *)out + info->stride );
+ }
+
+ return need_pipeline != 0;
+}
+
+
+#undef FLAGS
+#undef TAG
ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */
ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */
draw->nr_planes = 6;
+ draw->clip_xy = 1;
+ draw->clip_z = 1;
draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
}
+static void update_clip_flags( struct draw_context *draw )
+{
+ draw->clip_xy = !draw->driver.bypass_clip_xy;
+ draw->clip_z = (!draw->driver.bypass_clip_z &&
+ !draw->depth_clamp);
+ draw->clip_user = (draw->nr_planes > 6);
+}
+
/**
* Register new primitive rasterization/rendering state.
* This causes the drawing pipeline to be rebuilt.
draw->rasterizer = raster;
draw->rast_handle = rast_handle;
- draw->bypass_clipping = draw->driver.bypass_clipping;
- }
+ }
}
-
+/* With a little more work, llvmpipe will be able to turn this off and
+ * do its own x/y clipping.
+ *
+ * Some hardware can turn off clipping altogether - in particular any
+ * hardware with a TNL unit can do its own clipping, even if it is
+ * relying on the draw module for some other reason.
+ */
void draw_set_driver_clipping( struct draw_context *draw,
- boolean bypass_clipping )
+ boolean bypass_clip_xy,
+ boolean bypass_clip_z )
{
draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
- draw->driver.bypass_clipping = bypass_clipping;
- draw->bypass_clipping = draw->driver.bypass_clipping;
+ draw->driver.bypass_clip_xy = bypass_clip_xy;
+ draw->driver.bypass_clip_z = bypass_clip_z;
+ update_clip_flags(draw);
}
memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
draw->nr_planes = 6 + clip->nr;
draw->depth_clamp = clip->depth_clamp;
+
+ update_clip_flags(draw);
}
**************************************************************************/
#include "util/u_memory.h"
+#include "util/u_math.h"
#include "pipe/p_context.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_pt.h"
+
+#define DO_CLIP_XY 0x1
+#define DO_CLIP_FULL_Z 0x2
+#define DO_CLIP_HALF_Z 0x4
+#define DO_CLIP_USER 0x8
+#define DO_VIEWPORT 0x10
+#define DO_EDGEFLAG 0x20
+
+
struct pt_post_vs {
struct draw_context *draw;
+ unsigned flags;
+
boolean (*run)( struct pt_post_vs *pvs,
struct draw_vertex_info *info );
};
a[3]*b[3]);
}
-static INLINE unsigned
-compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr,
- boolean clip_depth)
-{
- unsigned mask = 0x0;
- unsigned i;
+#define FLAGS (0)
+#define TAG(x) x##_none
+#include "draw_cliptest_tmp.h"
-#if 0
- debug_printf("compute clipmask %f %f %f %f\n",
- clip[0], clip[1], clip[2], clip[3]);
- assert(clip[3] != 0.0);
-#endif
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT)
+#define TAG(x) x##_xy_fullz_viewport
+#include "draw_cliptest_tmp.h"
- /* Do the hardwired planes first:
- */
- if (-clip[0] + clip[3] < 0) mask |= (1<<0);
- if ( clip[0] + clip[3] < 0) mask |= (1<<1);
- if (-clip[1] + clip[3] < 0) mask |= (1<<2);
- if ( clip[1] + clip[3] < 0) mask |= (1<<3);
- if (clip_depth) {
- if ( clip[2] + clip[3] < 0) mask |= (1<<4); /* match mesa clipplane numbering - for now */
- if (-clip[2] + clip[3] < 0) mask |= (1<<5); /* match mesa clipplane numbering - for now */
- }
+#define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT)
+#define TAG(x) x##_xy_halfz_viewport
+#include "draw_cliptest_tmp.h"
- /* Followed by any remaining ones:
- */
- for (i = 6; i < nr; i++) {
- if (dot4(clip, plane[i]) < 0)
- mask |= (1<<i);
- }
+#define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT)
+#define TAG(x) x##_fullz_viewport
+#include "draw_cliptest_tmp.h"
- return mask;
-}
+#define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT)
+#define TAG(x) x##_halfz_viewport
+#include "draw_cliptest_tmp.h"
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT)
+#define TAG(x) x##_xy_fullz_user_viewport
+#include "draw_cliptest_tmp.h"
-/* The normal case - cliptest, rhw divide, viewport transform.
- *
- * Also handle identity viewport here at the expense of a few wasted
- * instructions
- */
-static boolean post_vs_cliptest_viewport_gl( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- struct vertex_header *out = info->verts;
- const float *scale = pvs->draw->viewport.scale;
- const float *trans = pvs->draw->viewport.translate;
- const unsigned pos = draw_current_shader_position_output(pvs->draw);
- unsigned clipped = 0;
- unsigned j;
-
- if (0) debug_printf("%s count, %d\n", __FUNCTION__, info->count);
-
- for (j = 0; j < info->count; j++) {
- float *position = out->data[pos];
-
- initialize_vertex_header(out);
-#if 0
- debug_printf("%d) io = %p, data = %p = [%f, %f, %f, %f]\n",
- j, out, position, position[0], position[1], position[2], position[3]);
-#endif
-
- out->clip[0] = position[0];
- out->clip[1] = position[1];
- out->clip[2] = position[2];
- out->clip[3] = position[3];
-
- out->vertex_id = 0xffff;
- /* Disable depth clipping if depth clamping is enabled. */
- out->clipmask = compute_clipmask_gl(out->clip,
- pvs->draw->plane,
- pvs->draw->nr_planes,
- !pvs->draw->depth_clamp);
- clipped += out->clipmask;
-
- if (out->clipmask == 0)
- {
- /* divide by w */
- float w = 1.0f / position[3];
-
- /* Viewport mapping */
- position[0] = position[0] * w * scale[0] + trans[0];
- position[1] = position[1] * w * scale[1] + trans[1];
- position[2] = position[2] * w * scale[2] + trans[2];
- position[3] = w;
-#if 0
- debug_printf("post viewport: %f %f %f %f\n",
- position[0],
- position[1],
- position[2],
- position[3]);
-#endif
- }
-
- out = (struct vertex_header *)( (char *)out + info->stride );
- }
-
- return clipped != 0;
-}
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT | DO_EDGEFLAG)
+#define TAG(x) x##_xy_fullz_user_viewport_edgeflag
+#include "draw_cliptest_tmp.h"
-/* As above plus edgeflags
+/* Don't want to create 64 versions of this function, so catch the
+ * less common ones here. This is looking like something which should
+ * be code-generated, perhaps appended to the end of the vertex
+ * shader.
*/
-static boolean
-post_vs_cliptest_viewport_gl_edgeflag(struct pt_post_vs *pvs,
- struct draw_vertex_info *info)
-{
- unsigned j;
- boolean needpipe;
-
- needpipe = post_vs_cliptest_viewport_gl(pvs, info);
-
- /* If present, copy edgeflag VS output into vertex header.
- * Otherwise, leave header as is.
- */
- if (pvs->draw->vs.edgeflag_output) {
- struct vertex_header *out = info->verts;
- int ef = pvs->draw->vs.edgeflag_output;
-
- for (j = 0; j < info->count; j++) {
- const float *edgeflag = out->data[ef];
- out->edgeflag = !(edgeflag[0] != 1.0f);
- needpipe |= !out->edgeflag;
- out = (struct vertex_header *)( (char *)out + info->stride );
- }
- }
- return needpipe;
-}
-
+#define FLAGS (pvs->flags)
+#define TAG(x) x##_generic
+#include "draw_cliptest_tmp.h"
-/* If bypass_clipping is set, skip cliptest and rhw divide.
- */
-static boolean post_vs_viewport( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- struct vertex_header *out = info->verts;
- const float *scale = pvs->draw->viewport.scale;
- const float *trans = pvs->draw->viewport.translate;
- const unsigned pos = draw_current_shader_position_output(pvs->draw);
- unsigned j;
-
- if (0) debug_printf("%s\n", __FUNCTION__);
- for (j = 0; j < info->count; j++) {
- float *position = out->data[pos];
-
- initialize_vertex_header(out);
- /* Viewport mapping only, no cliptest/rhw divide
- */
- position[0] = position[0] * scale[0] + trans[0];
- position[1] = position[1] * scale[1] + trans[1];
- position[2] = position[2] * scale[2] + trans[2];
-
- out = (struct vertex_header *)((char *)out + info->stride);
- }
-
- return FALSE;
-}
-
-
-/* If bypass_clipping is set and we have an identity viewport, nothing
- * to do.
- */
-static boolean post_vs_none( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- struct vertex_header *out = info->verts;
- unsigned j;
-
- if (0) debug_printf("%s\n", __FUNCTION__);
- /* just initialize the vertex_id in all headers */
- for (j = 0; j < info->count; j++) {
- initialize_vertex_header(out);
-
- out = (struct vertex_header *)((char *)out + info->stride);
- }
- return FALSE;
-}
-
boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
struct draw_vertex_info *info )
{
void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
- boolean bypass_clipping,
+ boolean clip_xy,
+ boolean clip_z,
+ boolean clip_user,
boolean bypass_viewport,
boolean opengl,
boolean need_edgeflags )
{
- if (!need_edgeflags) {
- if (bypass_clipping) {
- if (bypass_viewport)
- pvs->run = post_vs_none;
- else
- pvs->run = post_vs_viewport;
- }
- else {
- /* if (opengl) */
- pvs->run = post_vs_cliptest_viewport_gl;
- }
+ pvs->flags = 0;
+
+ if (clip_xy)
+ pvs->flags |= DO_CLIP_XY;
+
+ if (clip_z && opengl) {
+ pvs->flags |= DO_CLIP_FULL_Z;
+ ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 1 );
+ }
+
+ if (clip_z && !opengl) {
+ pvs->flags |= DO_CLIP_HALF_Z;
+ ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 0 );
}
- else {
- /* If we need to copy edgeflags to the vertex header, it should
- * mean we're running the primitive pipeline. Hence the bypass
- * flags should be false.
- */
- assert(!bypass_clipping);
- assert(!bypass_viewport);
- pvs->run = post_vs_cliptest_viewport_gl_edgeflag;
+
+ if (clip_user)
+ pvs->flags |= DO_CLIP_USER;
+
+ if (!bypass_viewport)
+ pvs->flags |= DO_VIEWPORT;
+
+ if (need_edgeflags)
+ pvs->flags |= DO_EDGEFLAG;
+
+ /* Now select the relevant function:
+ */
+ switch (pvs->flags) {
+ case 0:
+ pvs->run = do_cliptest_none;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_fullz_viewport;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_halfz_viewport;
+ break;
+
+ case DO_CLIP_FULL_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_fullz_viewport;
+ break;
+
+ case DO_CLIP_HALF_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_halfz_viewport;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_fullz_user_viewport;
+ break;
+
+ case (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER |
+ DO_VIEWPORT | DO_EDGEFLAG):
+ pvs->run = do_cliptest_xy_fullz_user_viewport_edgeflag;
+ break;
+
+ default:
+ pvs->run = do_cliptest_generic;
+ break;
}
}
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